How To Fix R1535 - BP cat. of both partners must be the same for undirected relship category

R1535 - Overview

• Message type: E = Error

• Message class: R1 - Business Partner Messages from S_BUPA_GENERAL

• Message number: 535

• Message text: BP cat. of both partners must be the same for undirected relship category

Self-Explanatory Message

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• What is the cause and solution for SAP error message R1535 - BP cat. of both partners must be the same for undirected relship category ?

  The SAP error message R1535 indicates that there is a mismatch in the business partner (BP) categories for the two partners involved in an undirected relationship. This error typically occurs when you are trying to create or maintain a relationship between two business partners, and the system requires that both partners have the same category for the relationship to be valid.
  
  Cause:
  The error arises when:
  
  You are attempting to create a relationship between two business partners (e.g., a customer and a vendor) that have different categories (e.g., one is a "Customer" and the other is a "Vendor").
  The relationship type you are trying to establish is defined as undirected, which means that both partners must belong to the same category.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Business Partner Categories:
  
  Go to the transaction code BP (Business Partner) in SAP.
  Look up both business partners involved in the relationship.
  Verify their categories (e.g., "Customer,"